A kind of TPO artificial leather and preparation method thereof

Abstract

This application relates to the field of automotive interior technology, specifically disclosing a TPO artificial leather and its preparation method. The TPO artificial leather comprises a TPO dense layer and a sponge layer. The TPO dense layer is made from the following raw materials in parts by weight: 50-70 parts of a first TPV material; 10-20 parts of a second TPV material; 8-14 parts of a high-elasticity PP material; 2-4 parts of a light stabilizer; and 2-4 parts of a masterbatch. The specifications of the first TPV material are as follows: MFR (230°C / 10kg): 90-95g / 10min; density: 0.85-0.95g / cm 3 Elongation at break: 300-340%; Specifications of the second TPV material are as follows: MFR (230°C / 10kg): 12-15g / 10min; Density: 0.86-0.90g / cm 3 Elongation at break: 500-540%. The preparation method comprises: mixing a first TPV material, a second TPV material, a high-elastic PP material, a light stabilizer, and a masterbatch, and then melt-extruding the mixture through an extruder to produce a dense TPO layer; heating the contact surfaces of the dense TPO layer and the sponge layer, and then pressurizing and laminating the resultant layer. The TPO artificial leather of this application exhibits high seam strength and low tear strength, excelling in meeting both seam processing requirements and airbag explosion requirements.

Description

Technical Field

[0001] The present application relates to the technical field of automobile interior decoration, and more specifically, to a TPO artificial leather and a preparation method thereof. Background Art

[0002] Synthetic leather is a diverse category, categorized by substrate type, including PVC, PU, ​​and TPO. TPO synthetic leather, also known as artificial leather, refers to leather materials made from thermoplastic polyolefins. It boasts excellent thermodynamic properties, wear resistance, and weather resistance, making it widely used in automotive interiors, furniture, and other fields. In particular, TPO artificial leather is used in the manufacture of components such as car seats, steering wheels, door trim, and interior instrument panels.

[0003] For example, a Chinese invention patent application document with patent publication number CN105907323A discloses a flame-retardant and environmentally friendly TPO synthetic leather and a preparation method thereof, wherein the TPO synthetic leather comprises: a TPO substrate, a scratch-resistant coating located on the upper surface of the TPO substrate, and an adhesive layer located on the lower surface of the TPO substrate; the TPO substrate comprises: a modified TPO film, and a polypropylene foam hot-pressed together with the modified TPO film; the modified TPO film comprises the following components in parts by weight: 10-70 parts of vulcanized TPO, 5-50 parts of polypropylene, 5-50 parts of polyethylene, 0-5 parts of a light stabilizer, and 4-15 parts of a pigment; the preparation method comprises: (1) preparing the modified TPO film; (2) preparing the TPO substrate; (3) surface treatment; and (4) back coating.

[0004] Regarding the above-mentioned related technologies, the inventors believe that, on the one hand, due to the special characteristics of TPO material, the sewing strength is poor, and composite fabrics are often required for sewing processing; on the other hand, when TPO artificial leather is used in the dashboard area of ​​automobile interiors, in order to facilitate the explosion and ejection of airbags, the TPO artificial leather often needs to be weakened, that is, partially deep cut to facilitate the smooth and rapid ejection of the airbag. Both of the above situations will bring significant limitations to the application of TPO artificial leather.

[0005] Therefore, it is urgent to propose a solution to solve the above technical problems. Summary of the Invention

[0006] In order to obtain TPO artificial leather having a certain sewing strength without using fabric and at the same time having the function of avoiding weakening and facilitating airbag explosion, the present application provides a TPO artificial leather and a preparation method thereof.

[0007] In a first aspect, the present application provides a TPO artificial leather, which adopts the following technical solution:

[0008] A TPO artificial leather, which consists of a TPO dense layer and a sponge layer, wherein the TPO dense layer is made of the following raw materials in parts by weight:

[0009] 50-70 parts of the first TPV material;

[0010] 10-20 parts of the second TPV material;

[0011] 8-14 parts of high elastic PP material;

[0012] 2-4 parts of light stabilizer;

[0013] 2-4 parts of masterbatch;

[0014] The specifications of the first TPV material are as follows:

[0015] MFR (230℃ / 10kg): 90-95g / 10min; Density: 0.85-0.95g / cm 3 ; Elongation at break: 300-340%;

[0016] The specifications of the second TPV material are as follows:

[0017] MFR (230℃ / 10kg): 12-15g / 10min; Density: 0.86-0.90g / cm 3 ; Elongation at break: 500-540%.

[0018] By adopting the above technical solution, the TPV material exhibits excellent weather resistance, ozone resistance, and UV resistance, as well as good high-temperature performance, electrical properties, and impact resistance, making it suitable for various molding methods such as extrusion and injection molding. PP is a thermoplastic resin formed by the polymerization of propylene monomers. It is colorless, transparent, or translucent, and exhibits high crystallinity, strength, and rigidity. Using both as the primary raw materials for the TPO dense layer ensures excellent processability during melt extrusion. Furthermore, the TPV materials used include a first TPV material and a second TPV material. The differences in their specifications allow for a unique molecular bonding structure when combined with the high-elasticity PP material. This results in the resulting TPO artificial leather possessing high seam strength, meeting sewing requirements without the use of fabric. Furthermore, the TPO artificial leather exhibits low tear strength, allowing it to withstand airbag deployment without requiring weakening during use. This results in an outstanding overall application of the resulting TPO artificial leather.

[0019] Preferably, the specifications of the first TPV material are as follows:

[0020] MFR (230℃ / 10kg): 95g / 10min; Density: 0.90g / cm3 ; Elongation at break: 320%;

[0021] The specifications of the second TPV material are as follows:

[0022] MFR (230℃ / 10kg): 15g / 10min; Density: 0.88g / cm 3 ; Elongation at break: 520%.

[0023] By adopting the above technical solution, the first TPV material and the second TPV material of the above specifications show better effects after being combined with high-elastic PP, so that the obtained TPO artificial leather shows higher stitching strength and lower tearing strength, and performs better in meeting the requirements of stitching processing and airbag explosion, thereby showing higher application quality as a whole.

[0024] Preferably, the specifications of the high-elastic PP material are as follows:

[0025] Shore hardness: 30-37A; MFR (230℃ / 2.16kg): 0.5-1g / 10min; tensile strength: 10-12Mpa; elastic modulus: 75-85Mpa.

[0026] By adopting the above technical solution, the high-elastic PP material of the above specifications can, on the one hand, be melt-bonded with the first TPV material and the second TPV material, and is not prone to uneven plastic deformation during subsequent processing; on the other hand, it can also form a relatively stable and excellent bond with the first TPV material and the second TPV material, so that the TPO artificial leather can take into account both high stitching strength and low tear strength, and the overall application performance is relatively excellent.

[0027] Preferably, the specifications of the high-elastic PP material are as follows:

[0028] Shore hardness: 33.5A; MFR (230℃ / 2.16kg): 0.75g / 10min; tensile strength: 11Mpa; elastic modulus: 80Mpa.

[0029] By adopting the above technical solution, the high-elastic PP of the above specifications can achieve better corresponding effects, and the quality of the TPO artificial leather finally obtained is also higher.

[0030] Preferably, the weight ratio of the first TPV material, the second TPV material and the high-elastic PP material is 60:15:11.

[0031] By adopting the above technical solution, when the first TPV material, the second TPV material and the high-elastic PP material in the above weight ratio are mixed and melt-extruded, the synergistic effect exerted by each other is relatively excellent. The combination of each phase and the network structure distribution formed can make the TPO artificial leather have higher stitching strength and lower tearing strength, and perform well in the applications of stitching processing and airbag blasting, thereby making the application performance of TPO artificial leather better.

[0032] Preferably, the light stabilizer is one or a combination of indole light stabilizers, phenol light stabilizers, benzimidazole light stabilizers, hydroxybenzoate light stabilizers, diphenol ketone light stabilizers, mercapto light stabilizers and aminophenol light stabilizers.

[0033] By adopting the above technical solution, the above types of light stabilizers are all suitable for the preparation of TPO dense layer, and can greatly improve the aging resistance, UV resistance and other properties of the TPO dense layer, thereby making the final TPO artificial leather have a longer service life and can still maintain relatively high stitching strength and low tearing strength after aging, and the overall application effect is stable.

[0034] Preferably, the masterbatch is one or a combination of organic pigment masterbatch and inorganic pigment masterbatch.

[0035] By adopting the above technical solution, the above-mentioned type of masterbatch brings a variety of colors after application without affecting the combination of other raw materials in the TPO dense layer. Under the premise of ensuring the stable application effect of TPO artificial leather, the product has a high richness.

[0036] Preferably, the raw material of the TPO dense layer is further added with 1-4 parts by weight of a functional additive, wherein the functional additive is composed of a composite sintered material and a phenolic resin, and the weight ratio of the composite sintered material to the phenolic resin is 1:(3-7); the composite sintered material is prepared by the following steps:

[0037] TiH2, SiC and carbon black in a weight ratio of (2-3):(6-9):1 are ball-milled and mixed, then hot-pressed and sintered, and then cooled, crushed and sieved to obtain a composite sintered material.

[0038] By adopting the above technical scheme, the composite sintered material obtained by mixing and sintering TiH2, SiC and carbon black is actually a particle with a layered structure. Due to the high content of SiC, there will be more holes in the composite sintered material. The composite sintered material with this structure is easy to be punctured during the sewing process and will not loosen after puncture, which can greatly improve the stability of the TPO dense layer during the sewing process, thereby improving the overall sewing strength of the TPO artificial leather; and the use of phenolic resin makes the internal three-dimensional network structure of the TPO dense layer uneven to a certain extent, and the tear strength is reduced, which is more suitable for airbag blasting requirements; at the same time, when the composite sintered material and phenolic resin are used in combination to form a functional additive, the two can bring about a compound synergistic effect. On the premise of ensuring the integrity of the TPO dense layer structure, the TPO artificial leather obtained by using the TPO dense layer is more suitable for sewing processing and airbag blasting requirements, and the overall applicability is further improved.

[0039] Preferably, the weight ratio of the composite sintered material to the phenolic resin is 1:5.

[0040] By adopting the above technical solution, when the composite sintered material and phenolic resin in the above weight ratio are used in combination, the corresponding effect is relatively stable and excellent. The TPO artificial leather finally obtained performs well in terms of high stitching strength and low tearing strength, and the overall application quality is high.

[0041] In a second aspect, the present application provides a method for preparing TPO artificial leather, which adopts the following technical solution:

[0042] A method for preparing TPO artificial leather comprises the following steps:

[0043] (1) Prepare raw materials including a first TPV material, a second TPV material, a high-elasticity PP material, a light stabilizer, and a masterbatch according to a ratio;

[0044] (2) mixing the first TPV material, the second TPV material, the high-elastic PP material, the light stabilizer and the masterbatch in step (1), and then melt-extruding them through an extruder to obtain a TPO dense layer;

[0045] (3) The contact surfaces of the TPO dense layer and the sponge layer are heated and then pressurized to obtain TPO artificial leather.

[0046] By adopting the above technical solution, the above preparation method is simple to operate and is suitable for large-scale industrial production. The TPO artificial leather obtained can not only meet the corresponding requirements of stitching strength, but also does not need to be used with fabrics in subsequent applications. It also has low tear strength and is free of weakening, which is conducive to the application effect of airbag explosion. The overall performance is outstanding.

[0047] In summary, this application has the following beneficial effects:

[0048] 1. Because the present invention utilizes two different specifications of first and second TPV materials, respectively, and combines them with a high-elastic PP material, the three form a special molecular bonding structure. As a result, the TPO artificial leather obtained by using the dense TPO layer not only has high seam strength, meeting the requirements of sewing processing without the use of fabric, but also meets the requirements of airbag explosion without weakening during use, resulting in an outstanding overall application effect.

[0049] 2. Since the present application uses a functional additive composed of a composite sintered material and a phenolic resin in the TPO dense layer, the applicability of the TPO artificial leather obtained by using the TPO dense layer in stitching processing and airbag blasting is further improved, and the balance between high stitching strength and low tear strength is more outstanding, and the application performance is better. DETAILED DESCRIPTION

[0050] The present application is further described in detail below with reference to preparation examples, embodiments and comparative examples.

[0051] Unless otherwise specified, the raw materials used in the preparation examples, embodiments and comparative examples of this application are commercially available:

[0052] The sponge layer is GXC-MPP15F polypropylene foam board.

[0053] The phenolic resin was purchased from SI Group as SP1068.

[0054] Preparation examples of raw materials and / or intermediates

[0055] Preparation Example 1

[0056] A composite sintering material is prepared by the following method:

[0057] TiH2, SiC and carbon black in a weight ratio of 2.5:7.5:1 were ball-milled and mixed, and then hot-pressed and sintered at 1600°C and 15 MPa for 2 hours. The composite sintered material was obtained by cooling, crushing and sieving with 200 mesh.

[0058] Preparation Example 2

[0059] A composite sintered material, which is different from Preparation Example 1 in that the weight ratio of TiH2, SiC and carbon black is 2:6:1.

[0060] Preparation Example 3

[0061] A composite sintered material, which is different from Preparation Example 1 in that the weight ratio of TiH2, SiC and carbon black is 3:9:1.

[0062] Example

[0063] Example 1

[0064] A TPO artificial leather is composed of a TPO dense layer and a sponge layer. The raw materials used in the TPO dense layer and their corresponding weights are shown in Table 1. The TPO artificial leather is prepared by the following method:

[0065] (1) Prepare raw materials including a first TPV material, a second TPV material, a high-elasticity PP material, a light stabilizer, and a masterbatch according to a ratio;

[0066] (2) The first TPV material, the second TPV material, the high-elastic PP material, the light stabilizer and the masterbatch in step (1) are stirred and mixed, and then melt-extruded through an extruder to obtain a TPO dense layer at an extrusion temperature of 190° C.;

[0067] (3) The bonding surfaces of the TPO dense layer and the sponge layer are heated at a temperature of 180°C for 30 seconds, and then pressurized and laminated at a pressure of 5 MPa to obtain TPO artificial leather.

[0068] Note: The TPO dense layer thickness is 0.4mm, and the sponge layer thickness is 2.4mm. The light stabilizer is a hydroxybenzoate light stabilizer purchased from Jianchu Biotechnology, UV-2908. The masterbatch is an inorganic pigment masterbatch purchased from Pangang R248 titanium dioxide. The specifications of the first TPV material are as follows: MFR (230°C / 10kg): 95g / 10min; density: 0.90g / cm 3 Elongation at break: 320%. Specifications of the second TPV material are as follows: MFR (230°C / 10kg): 15g / 10min; Density: 0.88g / cm 3 Elongation at break: 520%. Specifications of the high-elastic PP material are as follows: Shore hardness: 33.5A; MFR (230°C / 2.16kg): 0.75g / 10min; Tensile strength: 11Mpa; Elastic modulus: 80Mpa.

[0069] Example 2-3

[0070] A TPO artificial leather is different from Example 1 in that the raw materials used for the TPO dense layer and their corresponding weights are shown in Table 1.

[0071] Table 1 Raw materials used in the TPO dense layer in Example 13 and their weight parts (kg / part)

[0072]

[0073]

[0074] Example 4

[0075] A TPO artificial leather, which is different from Example 1 in that the specifications of the first TPV material are as follows: MFR (230°C / 10kg): 90g / 10min; density: 0.85g / cm 3 ; Elongation at break: 300%.

[0076] Example 5

[0077] A TPO artificial leather, which is different from Example 1 in that the specifications of the first TPV material are as follows: MFR (230°C / 10kg): 95g / 10min; density: 0.95g / cm 3 ; Elongation at break: 340%.

[0078] Example 6

[0079] A TPO artificial leather, which is different from Example 1 in that the specifications of the second TPV material are as follows: MFR (230°C / 10kg): 12g / 10min; density: 0.86g / cm 3 ; Elongation at break: 500%.

[0080] Example 7

[0081] A TPO artificial leather, which is different from Example 1 in that the specifications of the second TPV material are as follows: MFR (230°C / 10kg): 15g / 10min; density: 0.90g / cm 3 ; Elongation at break: 540%.

[0082] Example 8

[0083] A TPO artificial leather, which is different from Example 1 in that the specifications of the high-elastic PP material are as follows: Shore hardness: 30A; MFR (230°C / 2.16kg): 0.5g / 10min; tensile strength: 10MPa; elastic modulus: 75MPa.

[0084] Example 9

[0085] A TPO artificial leather, which is different from Example 1 in that the specifications of the high-elastic PP material are as follows: Shore hardness: 37A; MFR (230°C / 2.16kg): 1g / 10min; tensile strength: 12MPa; elastic modulus: 85MPa.

[0086] Example 10

[0087] A TPO artificial leather, which differs from Example 1 in that 2.5 parts by weight of a functional additive are further added to the raw materials of the TPO dense layer, the functional additive is mixed with the other raw materials, and the functional additive is composed of a composite sintered material and a phenolic resin in a weight ratio of 1:5, wherein the composite sintered material is obtained in Preparation Example 1.

[0088] Example 11

[0089] A TPO artificial leather, which is different from Example 10 in that the weight portion of the functional additive added is 1 part.

[0090] Example 12

[0091] A TPO artificial leather, which is different from Example 10 in that the weight portion of the functional additive added is 4 parts.

[0092] Example 13

[0093] A TPO artificial leather, which is different from Example 10 in that the functional additive is composed of a composite sintered material and a phenolic resin in a weight ratio of 1:3.

[0094] Example 14

[0095] A TPO artificial leather, which is different from Example 10 in that the functional additive is composed of a composite sintered material and a phenolic resin in a weight ratio of 1:7.

[0096] Example 15

[0097] A TPO artificial leather, which is different from Example 10 in that the composite sintered material is obtained from Preparation Example 2.

[0098] Example 16

[0099] A TPO artificial leather, which is different from Example 10 in that the composite sintered material is obtained from Preparation Example 3.

[0100] Example 17

[0101] A TPO artificial leather is different from Example 10 in that no composite sintered material is used in the raw materials.

[0102] Example 18

[0103] A TPO artificial leather is different from Example 10 in that no phenolic resin is used in the raw materials.

[0104] Comparative Example

[0105] Comparative Example 1

[0106] A TPO artificial leather is different from Example 1 in that the first TPV material is replaced by a second TPV material of equal mass.

[0107] Comparative Example 2

[0108] A TPO artificial leather is different from Example 1 in that the second TPV material is replaced by the first TPV material of equal mass.

[0109] Performance Testing Test Samples: The TPO artificial leathers obtained in Examples 1-18 were used as test samples 1-18, and the TPO artificial leathers obtained in Comparative Examples 1-2 were used as control samples 1-2.

[0110] Test Method: Test samples 1-18 and control samples 1-2 were tested according to the requirements of BMW internal standard BMW 5A2A46 / 6 TPO sewing. The test items were seam strength, tear strength (normal state) and tear strength (after heat aging). The corresponding results are recorded in Table 2 below.

[0111] Table 2 Test results of test samples 1-18 and control samples 1-2

[0112]

[0113]

[0114] Combining Examples 1-3 with Comparative Examples 1-2 and Table 2, it can be seen that the use of two different specifications of first and second TPV materials, combined with a high-elastic PP material as the primary raw materials for preparing a TPO dense layer, and the application of the TPO dense layer to ultimately produce TPO artificial leather, revealed high seam strength and low tear strength. This material can meet sewing requirements without fabric, and can withstand airbag bursting without weakening. However, when either TPV material alone is combined with the high-elastic PP material, the resulting TPO artificial leather exhibits poor seam strength and tear strength, and cannot be stably sewn in practical applications, requiring fabric and weakening to meet airbag bursting requirements.

[0115] Combining Example 1 and Example 4-5 with Table 2, it can be seen that the specifications of the first TPV material are MFR (230℃ / 10kg): 90-95g / 10min, density: 0.85-0.95g / cm 3 , elongation at break: 300-340%, can ensure that the final TPO artificial leather has stable and good performance in terms of stitching strength and tearing strength, wherein the specifications of the first TPV material are MFR (230℃ / 10kg): 95g / 10min, density: 0.90g / cm3 , Elongation at break: When it is 320%, the corresponding quality of TPO artificial leather is the best.

[0116] Combining Example 1 and Example 6-7 with Table 2, it can be seen that the specifications of the second TPV material are MFR (230℃ / 10kg): 12-15g / 10min, density: 0.86-0.90g / cm 3 , elongation at break: 500-540%, can ensure that the final TPO artificial leather has stable and good performance in terms of stitching strength and tearing strength. Among them, when the specifications of the second TPV material are MFR (230℃ / 10kg): 15g / 10min, density: 0.88g / cm 3 , Elongation at break: When it is 520%, the corresponding quality of TPO artificial leather is the best.

[0117] Combining Example 1 and Examples 8-9 with Table 2, it can be seen that when the specifications of the high-elastic PP material are Shore hardness: 30-37A, MFR (230°C / 2.16kg): 0.5-1g / 10min, tensile strength: 10-12Mpa, and elastic modulus: 75-85Mpa, the final TPO artificial leather can be guaranteed to have stable and excellent performance in terms of stitching strength and tear strength. Among them, when the specifications of the high-elastic PP material are Shore hardness: 33.5A, MFR (230°C / 2.16kg): 0.75g / 10min, tensile strength: 11Mpa, and elastic modulus: 80Mpa, the corresponding quality of the TPO artificial leather is the best.

[0118] Combining Examples 1 and 10-14 with Table 2, it can be seen that the use of a functional additive composed of a composite sintered material and a phenolic resin in the TPO dense layer can further improve the stitching strength and reduce the tear strength, making the TPO artificial leather more suitable for both stitching and airbag explosion, and achieving better compatibility. When the weight ratio of the composite sintered material to the phenolic resin is 1:5, the corresponding improvement effect of the TPO artificial leather is better. Combining Examples 15-16 with Table 2, it can be seen that composite sintered materials made with TiH2, SiC, and carbon black in a weight ratio of (2-3):(6-9):1 can all be combined with phenolic resin to produce excellent and stable effects. Combined with Examples 17-18 and Table 2, it can be seen that if any one of the composite sintered material and the phenolic resin is used alone in the TPO dense layer, the corresponding effect is limited, and the sum of their respective effects is far less than the excellent effect brought by the combination of the two. It can be seen that the functional additive composed of the composite sintered material and the phenolic resin has a significant effect on improving the application quality of TPO artificial leather.

[0119] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A TPO artificial leather, characterized in that: It consists of a TPO dense layer and a sponge layer, wherein the TPO dense layer is made of the following raw materials in parts by weight: 50-70 parts of the first TPV material; 10-20 parts of the second TPV material; 8-14 parts of high elastic PP material; 2-4 parts of light stabilizer; 2-4 parts of masterbatch; The specifications of the first TPV material are as follows: MFR measured at 230°C with a load of 2.16 kg: 90-95 g / 10 min; density: 0.85-0.95 g / cm 3 ; Elongation at break: 300-340%; The specifications of the second TPV material are as follows: MFR measured at 230°C with a load of 2.16 kg: 12-15 g / 10 min; density: 0.86-0.90 g / cm 3 ; Elongation at break: 500-540%; The specifications of the high elastic PP material are as follows: Shore hardness: 30-37A; MFR measured at 230°C with a load of 2.16kg: 0.5-1g / 10min; tensile strength: 10-12Mpa; Elastic modulus: 75-85 MPa.

2. The TPO artificial leather according to claim 1, characterized in that: The specifications of the first TPV material are as follows: MFR measured at 230°C with a load of 2.16 kg: 95 g / 10 min; density: 0.90 g / cm 3 ; Elongation at break: 320%; The specifications of the second TPV material are as follows: MFR measured at 230°C and a load of 2.16 kg: 15 g / 10 min; density: 0.88 g / cm 3 ; Elongation at break: 520%.

3. The TPO artificial leather according to claim 1, characterized in that: The specifications of the high elastic PP material are as follows: Shore hardness: 33.5A; MFR measured at 230°C with a load of 2.16kg: 0.75g / 10min; tensile strength: 11Mpa; elastic modulus: 80Mpa.

4. The TPO artificial leather according to claim 3, characterized in that: The weight ratio of the first TPV material, the second TPV material and the high-elastic PP material is 60:15:

11.

5. The TPO artificial leather according to claim 1, characterized in that: The light stabilizer is one or a combination of indole light stabilizers, phenol light stabilizers, benzimidazole light stabilizers, hydroxybenzoate light stabilizers, diphenol ketone light stabilizers, mercapto light stabilizers and aminophenol light stabilizers.

6. The TPO artificial leather according to claim 1, characterized in that: The masterbatch is a combination of one or more of organic pigment masterbatch and inorganic pigment masterbatch.

7. The TPO artificial leather according to claim 1, characterized in that: The raw materials of the TPO dense layer are further added with 1-4 parts by weight of a functional additive, wherein the functional additive is composed of a composite sintered material and a phenolic resin, and the weight ratio of the composite sintered material to the phenolic resin is 1:(3-7). The composite sintered material is prepared by the following steps: TiH2, SiC and carbon black in a weight ratio of (2-3): (6-9): 1 are ball-milled and mixed, then hot-pressed and sintered, and then cooled, crushed and sieved to obtain a composite sintered material.

8. The TPO artificial leather according to claim 7, characterized in that: The weight ratio of the composite sintering material to the phenolic resin is 1:

5.

9. The method for preparing TPO artificial leather according to claim 1, wherein: The following steps are involved: (1) Prepare raw materials including the first TPV material, the second TPV material, the high-elasticity PP material, the light stabilizer and the masterbatch according to the ratio; (2) The first TPV material, the second TPV material, the high-elastic PP material, the light stabilizer and the masterbatch in step (1) are stirred and mixed, and then melt-extruded through an extruder to obtain a TPO dense layer; (3) The bonding surfaces of the TPO dense layer and the sponge layer are heated and then pressurized to obtain TPO artificial leather.

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